Over at the coolarduino blog they have been working on a variety of analogue-digital (and vice-versa) projects that interface with various Arduino boards. One of these which caught my attention is their quasi-oscilloscope. By using an Arduino Leonardo (or compatible) you can recreate their four-channel quasi-scope. The external circuitry required in this version has been reduced due to the programmable gain amplifier in the board's ATmega32U4 microcontroller. The display is certainly unique - using the serial monitor - for example:

Certainly an interesting example of home-brew test equipment. For more information and plans visit the project page here. And for more, we're on twitter and Google+, so follow us for news and product updates as well.

Looking to recreate this project, or need an Arduino Leonardo-compatible board that's cheaper and smaller than the original? Then consider the Freetronics LeoStick:

Apart from being one of the smallest Arduino-compatibles on the market with USB, it also has an onboard RGB LED and piezo which can be used a knock sensor and various tune and sound effects. Plus you can add extra circuitry with the matching protostick! For more information and to order, click here.